Coffee is a multibillion dollar industry that supports the economies of several tropical countries. Unfortunately for them， coffee bushes grow best in a rather narrow range of temperatures， so their cultivation is threatened by a changing climate.

如今，咖啡產(chǎn)業(yè)具有數(shù)千億美元的市場(chǎng)規(guī)模，并對(duì)一些熱帶地區(qū)國(guó)家的經(jīng)濟(jì)起到支撐作用。然而對(duì)這些國(guó)家來(lái)說(shuō)，不幸的是，咖啡樹(shù)最適宜生長(zhǎng)的溫度范圍相當(dāng)狹窄，所以氣候的變化正對(duì)咖啡的種植構(gòu)成威脅。

The existing coffee market is dominated by Coffea arabica and Coffea canephora. Arabica prefers temperatures of 18℃—22℃. Recent work suggests that Coffea canephora does not flourish above 24℃.

目前，咖啡市場(chǎng)的主導(dǎo)品種是小果咖啡和中果咖啡。小果咖啡適宜生長(zhǎng)在18℃—22℃的環(huán)境里。而最近的研究表明，環(huán)境溫度一旦超過(guò)24℃，中果咖啡就無(wú)法健康生長(zhǎng)了。

But a chance discovery by Aaron Davis of the Royal Botanic Gardens， Kew， in Britain， may offer a way out. Dr Davis and his colleagues report that they have tracked down a type of wild coffee which is both pleasant to taste and tolerant of higher temperatures.

不過(guò)，英國(guó)皇家植物園（邱園）的亞倫·戴維斯的一個(gè)偶然發(fā)現(xiàn)，也許能提供解決這一問(wèn)題的思路。戴維斯博士和他的同事們表示，他們已經(jīng)搜尋到了一種味道又好、又耐高溫的野生咖啡品種。

Dr Davis came across a paper written in 1834 by George Don， a Scottish botanist， which described a species from Sierra Leone. Don dubbed it Coffea stenophylla， and wrote that it had a flavor superior to arabica’s.

戴維斯博士偶然讀到了蘇格蘭植物學(xué)家喬治·頓寫(xiě)于1834年的一篇論文，這篇論文介紹了來(lái)自塞拉利昂的一個(gè)（咖啡）品種。頓把該品種稱(chēng)為狹葉咖啡。他還寫(xiě)道，這種咖啡的味道比小果咖啡好。

This piqued Dr Davis’s interest， for stenophylla still grows in parts of Guinea， Sierra Leone and C?te d’Ivoire that have temperature ranges between 24℃ and 26℃. He and his colleagues also learned that stenophylla was farmed up until the 1920s， after which canephora， which had higher yields， took over.

這激起了戴維斯博士的興趣，因?yàn)楠M葉咖啡至今仍然生長(zhǎng)在幾內(nèi)亞、塞拉利昂以及科特迪瓦的部分地區(qū)，這些地區(qū)的氣溫為24℃—26℃。戴維斯博士和同事們還得知，一直到20世紀(jì)20年代，人們還在種植狹葉咖啡，但之后這種咖啡就被產(chǎn)量更高的中果咖啡取而代之。

That opens two possible courses of action. One is to cultivate stenophylla directly， though this might run into the yield problem which led to its abandonment in the first place. The other is to crossbreed it with existing cultivars， to endow those high-yielding varieties with its heat tolerance.

這指向了兩種潛在的行動(dòng)方案。其一是直接種植狹葉咖啡，但是這種方案可能會(huì)使咖啡種植陷入產(chǎn)量不足的困境，當(dāng)初人們放棄這個(gè)品種就是因?yàn)楫a(chǎn)量問(wèn)題。其二是將狹葉咖啡與現(xiàn)存的栽培品種雜交，從而賦予那些高產(chǎn)品種以耐高溫的品質(zhì)。

Whichever path is pursued， though， the rediscovery of stenophylla’s qualities offers hope not only to coffee growers， but also to the world’s caffeine addicts.

不過(guò)，不論走哪條路，狹葉咖啡（優(yōu)良）品質(zhì)的重新發(fā)掘既給咖啡的種植者帶來(lái)了希望，也讓這個(gè)世界的咖啡迷們看到了曙光。

Word Bank

range /re?nd?/ n.（變動(dòng)或浮動(dòng)的）范圍，界限，區(qū)間

Most of the students are in the 17—20 age range.

flourish /'fl?r??/ v. 茁壯成長(zhǎng)；繁榮；昌盛；興旺

These plants flourish in a damp climate.

tolerant /'t?l?r?nt/ adj. 能在困難條件下生存的；能耐……的

pique /pi?k/ v. 使……興趣盎然；引起……的好奇

yield /ji?ld/ n. 產(chǎn)量；產(chǎn)出；利潤(rùn)

crossbreed /'kr??sbri?d/ v.（使）雜交繁育